Rolling-mill appliance.



A. PISARGIK. ROLLING MILL APPLIANCE. APPLIGATION FILED JULY 22, 1912.

Cafchers Qo/lers Side. Side H fly; 5.

INVENTOR Patented Jan. 13, 1914.

lF l'l D STATES ATENT OFFICE.

ANDRO PISARCIK, OF VANDERG'RIFT, PENNSYLVANIA, ASSIGNOR TO AMERICAN SHEET & TIN PLATE COMPANY, OF PITTSBURGH, PENNSYLVANIA, .A. CORPORA- TION OF NEW JERSEY.

nosaior.

To all whom it may concern:

Be it known that I, Ammo PISARCIK, a subject of the King of Hungary and Emperor of Austria, residing at Vandergr1ft,in the county of WVestmoreland and State of Pennsylvania, have invented a new and useful Rolling-Mill Appliance, of which the following is a specification.

My invention has relation to the apparatus by which the rolls are mounted in the housings of rolling mills, and, while not restricted to such use, more particularly relates to the construction and arrangement of the top roll bearing and bearing carrlers or riders employed on two high sheet and plate mills.

In rolling sheets and tin plates, the rolls rotate constantly in one direction, one, the bottom roll alone being positively driven and the metal being rolled is always passed between the rolls in the passes to which it is subjected from the front or rollers side, to the rear or catchers side of the mill, being lifted and handed back from the catchers to the rollers side over the rotating top roll. In operating such mills, the top roll brasses or bearings wear more rapidly on the catchers side of a vertical line through the aXes of the rolls than on the rollers side. The reason for such result will be readily seen when it is remembered that the work of the mill in reducing the metal is always performed while the metal is passing from the rollers to the catchers side of the mill and that the mill is turning idly when the metal is lifted and passed back over the top roll from the catchers to the rollers side. As the hearings or brasses wear on one side more than on the other of the vertical axis of the roll and roll bearing, the riders gradually get out of level, the catchers side of the riders becoming lower than the rollers side and as the bearings are inset to a considerable distance within the recess in the bottom face of the rider the bearing on the catchers side of the mill is worn to the point where the bearing must be dis carded long before the side of the bearing on the other or rollers side of the mill. hen the rider is not level the tendency and Specification of Letters Patent.

Application filed July 22, 1912.

Patented Jan. 13, 1914.

Serial No. 710,816.

liability of the roll adjusting screws to stick is very much increased on account of the side thrust put upon the screws. In such mills, in which the top or jump roll is adj usted relative to the bottom roll between successive passes of the metal therebetween, the top hearings or brasses also are frequently broken, owing to the strain put upon them by the jumping of the rolls, particularly after the bearings become thin by wear after extended use and when worn unevenly so the riders are not maintained in a level or horizontal position. Heretofore the breakage of a top bearing necessitated its removal and replacement, which was the cause of frequent delays in the operation of the mill, as well as interruption in the operation of the other mills in the same set. As a series of such mills are generally con nected and are driven by a single engine or other motor, such delays are expensive on account of the time lost in operating the mills, in addition to the cost of the discarded broken bearings, which oft-times break shortly after being put into use.

One object of my invention is to provide a top roll hearing or brass of improved construction having novel means whereby the bearing is caused to wear evenly and uniformly on opposite sides of the axis of the roll to which it is applied for use and the life of the bearings thereby largely increased, while liability of sticking of the screws by reason of side thrust thereon is avoided and overcome.

Another object of the invention is to provide a roll bearing and rider or carrier therefor having novel means whereby delays occasioned by breakage of a roll brass or hearing are avoided and overcome and the continued operation of the mill until the arrival of a suit-able time to replace the broken bearing, such as the end of the week, is made possible and is practically assured.

Still another object of this invention is to provide carriers or riders and bearings of improved construction by means of which. the bearings can be used, if desired, until worn out by long service after becoming broken, and the expense occasioned in re moving and replacing such bearings after becoming broken is lessened or rendered unnecessary.

Further objects of my invention will be disclosed hereinafter as the invention is more fully set forth in the specification and claims.

Referring to the accompanying drawings forming part of this specification, Figure 1 is a sectional elevation showing the upper part of the inner side of a roll housing having a top roll hearing and rider or bearing carrier mounted in the window thereof as constructed and arranged in accoroance with my invention. Fig. 2 is an inverted plan showing a detail of the construction of the bearing and bearing carrier. Fig. 3 is a sectional side elevation showing a. detail of the roll bearing and the bearing carrier or rider.

In the drawings the numeral 2 designates a closed top roll housing having a housing screw 3 mounted in the nut 4, which is removably secured in place in the upper end of the housing 2, and secured on the squared upper end of the screw 3 is a wheel 5 for the spanner by which the housing screw 3 is adjusted in varying the distance between the faces of the opposing top and bottom rolls during the rolling operations. The construction of the housing, the housing screw, and other parts of the mill, not forming part of this invention, will not be further described.

The lower end of the housing screw 3 engages with a breaker block 6, which is located in the recess '7 in the top surface of the roll carrier or rider 8. The carrier 8 is of such width as will neatly fit between the side faces 9 of the window 10 in the housing 2, its inner end being provided with the usual lugs or wings 11 on one end of the bearing carrier which prevents lengthwise movement in one direction of the carrier in the housing window.

Mounted in the lengthwise tapering recess 12 in the lower surface of the carrier 8 is the top hearing or brass 13, the concave lower face 14fl14e of this brass having the same curvature the roll neck 20 with which it engages.

As will be seen by reference to Fig. 2, the sides 15 15 of the recess 12 in the carrier 8 and the engaging side faces of the bearing 13 taper lengthwise with the small end of the double taper at the outside end of the bearing, and its carrier. The top surface of the bearing 13 is provided with a transversely extending rabbet 17 and the recess 12 in the under face of the carrier 8 has a dropped portion 18 so as to form shoulders on the bearing and its carrier, which limits relative endwise movement of the carrier and bearing in one direction. The rounded end 19 of the bearing 13 engages with the fillet on the neck of the rolls so as to resist or oppose the axial end thrust of the roll when positioned in the housing and the tapering engaging faces 15 and 16 and 15 16 on the side edges of the bearing 13 prevent or limit endwise movement of the bearing 13 in the recess 12 in an outward direction.

The'side 15 of the roll bearing 13 (on the right in Fig. 1) which is the side of the bearing on the rollers side of the mill, is cut away so that the area of the portion 11* of the concave surface of the bearing is less than that of the portion 14 of this surface on the catchers side of the mill, (the left in Fig. 1) so that when in use the bearing 13 will wear evenly as the increased area of the portion 14* will compensate for the increased wear on the portion 1 1 over that on the smaller area 141 As bearings 13, when made in this manner, are unsymmetrical about their lengthwise center it will be necessary to make the pairs of top hearings used in each mill right and left hand.

Should, in the operation of the mill, the bearing 13 break lengthwise at its thinnest part, as frequently occurs after the bearings are worn thin in service or become broken transversely, as also occurs, the tapering faces on the bearing engaging with correspondingly tapering side edges of the recess in which the bearing 13 is mounted will wedge the pieces of the broken bearing in the carrier 8 and will prevent the pieces or either one of them from gradually working endwise out of the recess in the carrier, while the jog forming the rabbet 17 in the bearing 13 by engagement with the shoulder 18 on the carrier prevents lengthwise movement inward of the bearing in the carrier even after the bearing becomes broken. In this way, even when broken, the use of the bearing can be continued without liability of damage to the mill until a delay in the operation of the mill affords time for replacement by a new bearing, while the necessity of interrupting the operations of the mills at inopportune times to remove and replace the broken bearing with a new one is rendered unnecessary.

The advantages of my invention will be apparent to those skilled in the art. By making the concave surface of the roll bearings engaging with the roll necks unsymmetrical and making the area of the portion of such surface of the bearing on the rollers side of the vertical axial center of the rolls less than that on the catchers side, the bearings are caused to wear evenly and the riders are maintained in the desired level or horizontal position. The engaging shoulders on the bearings and carriers prevent the bearings from working inwardly and the resulting jamming of the rounded surfaces on the ends of the bearings against the fillets on the roll necks and in this way liability of hot necks on the rolls is lessened or overcome. The bearings can be continued in use indefinitely after becoming broken and in this way long and frequent delays in the operation of the mills and monetary losses oc casioned thereby are avoided and prevented.

Modifications and changes in the construction of the apparatus may be made without departing from my invention as defined in the claims.

I claim 1. In a rolling mill a rider having a recessed face, and a roll bearing seated in said recess, said bearing and rider having con-' tacting taper faces forming means co-acting to prevent endwise movement of the bearings in said recess.

2. In a rolling mill a rider having a recessed face, and a roll bearing seated in said recess, the engaging side edges of said bearing and recess tapering lengthwise of the bearing to wedge and prevent lengthwise movement of the bearing in said recess.

3. In a rolling mill a rider having a recessed face, and a roll bearing seated in said recess, the engaging side edges of said bear ing and recess tapering lengthwise of the bearing to wedge and prevent lengthwise movement of the bearing in said recess in one direction, and opposing shoulders on said bearing and carrier whereby movement of the bearing lengthwise in said recess is prevented in the opposite direction.

4E. In a rolling mill a rider having a recessed face, and a top roll bearing seated in said recess, said bearing having a concave surface for engaging the roll neck, said surface being unsymmetrical about the vertical plane of the axial center of the roll neck.

5. In a rolling mill a rider having a recessed face, and a top roll bearing seated in said recess, said bearing having a concave surface for engaging the roll neck, said surface being unsymmetrical about a vertical plane through the axial center of the roll neck, the portion of said surface on the rollers side of a vertical plane through the axial center of the roll neck being of less area than that on the catchers side of said vertical plane.

6. In a rolling mill a rider having a re cessed face, and a top roll bearing seated in said recess, said bearing having a concave surface for engaging the roll neck, said surface being unsymmetrical about a vertical plane through the axial center of the roll neck, said rider and bearing having means co-acting to prevent endwise movement of the bearing in the rider.

7. In a rolling mill a rider having a recessed face, and a top roll bearing seated in said recess, said bearing having a concave surface for engaging the roll neck, said surface being unsymmetrical about a vertical plane through the axial center of the roll neck, the engaging side edges of said bearing and recess tapering lengthwise of the bearing to wedge and prevent lengthwise movement of the bearing in said recess.

8. In a rolling mill a rider having a recessed face, and a top roll bearing seated in said recess, said bearing having a concave surface for engaging the roll neck, said surface being unsymmetrical about a vertical plane through the axial center of the roll neck, the portion of said surface on the rollers side of a vertical plane through the axial center of the roll neck being of less area than that on the catchers side of the mill, the engaging side edges of said hearing and recess tapering lengthwise of the bearing to wedge and prevent lengthwise movement of the bearing in said recess.

9. In a rolling mill a rider having a recessed face, and a top roll bearing seated in said recess, said bearing having a concave surface for engaging the roll neck, said surface being unsymmetrical about a ver tical plane through the axial center of the roll neck, the portion of said surface on the rollers side of a vertical plane through the axial center of the roll neck being of less area than that on the catchers side of the mill, the engaging side edges of said hearing and recess tapering lengthwise of the bearing to wedge and prevent lengthwise movement of the bearing in said recess in one direction, and opposing shoulders on said bearing and carrier whereby movement of the bearing lengthwise in said recess is prevented in the opposite direction.

10. In a rolling mill a roll bearing having a concave face for contacting with the roll neck, said face being unsymmetrical about the longitudinalcenter of the bearing to thereby provide surfaces of unequal area on opposite sides of a vertical plane through the axial center of the roll neck.

In testimony whereof, I have hereunto set my hand.

ANDRO PISARCIK. Witnesses H. L. Bonwnnn, H. L. Annnnson.

Eunice mt this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

